Questions related to boundary lines between nations are common in the general awareness section of SSC Exams, UPSC, Bank and Government exams like SBI PO and Clerk, IBPS PO and Clerk, RBI Grade B and Assistant, and more.
| BOUNDARY LINE | NATIONS | SPECIFIC DETAILS |
| Marginal Line | Russia and Finland | 320 km line of fortification on the Russian – Finland border |
| Line of Actual Control | India and China | India and China on the Northern Border |
| Line of Control | India and Pakistan | Military Control Line |
| Durand Line | Afghanistan and Pakistan | Created when Pakistan was still a part of India |
| Radcliffe Line | India and Pakistan | Includes Bangladesh Line |
| Blue Line | Israel and Lebanon | – |
| Purple Line | Israel and Syria | – |
| Green Line | Israel and its Neighbours | Neighbours are Egypt, Jordan, Lebanon and Syria |
| Mason-Dixon Line | Maryland and Pennsylvania | Maryland and Delaware in Colonial America |
| Curzon Line | Poland and Russia | – |
| Military Demarcation Line (MDL) | North Korea and South Korea | Also called Armistice Line |
| McMohan Line | India and China | Tibetan region of China and North-east region of India |
| Maginot Line | France and Germany | Built before World War II to protect the eastern border of France |
| Mannar Haime Line | Russia and Finland | Named during the Winter War |
| Hindenburg Line | Poland and Germany | At the time of World War I |
| Sigfried Line East | France and Germany | At the time of World War II |
| Order Neisse Line | Germany and Poland | Aftermath of World War II |
| 16 Parallel North | Angola and Nambia | – |
| 17 Parallel Line | North and South Vietnam | – |
| 20 Parallel North | Libya and Sudan | – |
| 22 Parallel North | Egypt and Sudan | – |
| 25 Parallel North | Mauritania and Mali | – |
| 26 Parallel North | Western Sahara and Mauritania | – |
| 31 Parallel North | Iraq and Iran | – |
| 35 Parallel North | US | It serves as border between Tennessee & Mississippi, Tennessee & Alabama, Tennessee & Georgia, North Carolina & Georgia |
| 36 Parallel North | US | It forms the southernmost boundary of the state of Missouri with the state of Arkansas |
| 38 Parallel North Line | North & South Korea | – |
| 40 Parallel North | US | It serves as border between Nebraska and Kansas |
| 41 Parallel North | US | It forms the border between Wyoming and Utah, Wyoming and Colorado, Nebraska & Colorado |
| 42 Parallel North | US | It serves as border between New York and Pennsylvania |
| 43 Parallel North | US | It serves as border between State Nebraska and State of South Dakota |
| 45 Parallel North | US | It forms the boundary between Montana and Wyoming |
| 49 Parallel North | USA and Canada | Also called Medicine Line |